Preprints
https://doi.org/10.5194/essd-2021-400
https://doi.org/10.5194/essd-2021-400
 
15 Mar 2022
15 Mar 2022
Status: this preprint is currently under review for the journal ESSD.

Improved maps of surface water bodies, large dams, reservoirs, and lakes in China

Xinxin Wang1,2, Xiangming Xiao2, Yuanwei Qin2, Jinwei Dong3, Jihua Wu4, and Bo Li1,5 Xinxin Wang et al.
  • 1Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai 200438, China
  • 2Department of Microbiology and Plant Biology, Center for Earth Observation and Modeling, University of Oklahoma, Norman, OK 73019, USA
  • 3Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • 4State Key Laboratory of Grassland Agro-Ecosystems, and College of Ecology, Lanzhou University, Lanzhou, Gansu 730000, China
  • 5Centre for Invasion Biology, Institute of Biodiversity, Yunnan University, Kunming, Yunnan 650504, China

Abstract. Data and knowledge of surface water bodies (SWB), including large lakes and reservoirs (surface water areas > 1 km2) are critical for the management and sustainability of water resources. However, the existing global or national dam datasets have large georeferenced coordinate offsets for many reservoirs, and some datasets have not reported reservoirs and lakes separately. In this study, we generated China’s surface water bodies, Large Dams, Reservoirs, and Lakes (China-LDRL) dataset by analyzing all available Landsat imagery in 2019 (19,338 images) in Google Earth Engine and very-high spatial resolution imagery in Google Earth. There were ~3.52 × 106 yearlong SWB polygons in China for 2019, only 0.01 × 106 of them (0.43 %) were of large size (> 1 km2). The areas of these large SWB polygons accounted for 83.54 % of the total 214.92 × 103 km2 yearlong surface water area (SWA) in China. We identified 2,140 large dams, including 1,494 reservoir dams and 646 river dams, 1,976 large reservoirs (16.42 × 103 km2), and 3,508 large lakes (75.97 × 103 km2). In general, most of the dams and reservoirs in China were distributed in South China, East China, and Northeast China, whereas most of lakes were located in West China, the Lower Yangtze River Basin, and Northeast China. The provision of the reliable, accurate China-LDRL dataset on dams, large reservoirs and lakes will enhance our understanding of water resources management and water security in China. The China-LDRL dataset is publicly available at https://doi.org/10.6084/m9.figshare.16964656.v2 (Wang et al., 2022).

Xinxin Wang et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-400', Anonymous Referee #1, 19 Mar 2022
    • AC1: 'Reply on RC1', Xiangming Xiao, 27 May 2022
  • RC2: 'Comment on essd-2021-400', Jida Wang, 14 Apr 2022
    • AC2: 'Reply on RC2', Xiangming Xiao, 27 May 2022

Xinxin Wang et al.

Data sets

China-LDRL: China’s surface water bodies, Large Dams, Reservoirs, and Lakes dataset Xinxin Wang, Xiangming Xiao, Yuanwei Qin, Jinwei Dong, Jihua Wu, Bo Li https://doi.org/10.6084/m9.figshare.16964656.v2

Xinxin Wang et al.

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Short summary
We generated China’s surface water bodies, Large Dams, Reservoirs, and Lakes (China-LDRL) dataset by analyzing all available Landsat imagery in 2019 (19,338 images) in Google Earth Engine. The dataset provides accurate information on the geographical locations and sizes of surface water bodies, large dams, reservoirs, and lakes in China. The China-LDRL dataset will contribute to the understanding of water security and water resources management in China.